Nobody has provided proof that the Diamonds are NOT now mixed in with PM's and GM's at the same call desk.
Posts all over FT about operators now not knowing how to deal with GUC's and other DM benefits, which seem way more common than explained by the typical amount of operator turnover on a "dedicated DM line".

The excuse that there are more Diamonds after the AMEX waiver increase makes ZERO sense.
Those operators fielding more calls from PM's and GM's does make sense.